Furnace.



No. 889,366. PATEN-TED JUNE 2, 1908.

J. GREIS. FURNACE.

APPLICATION FILED JAN. 23, 1907.

3 SHEETS-SHEET 2.

PATENTED JUNE 2, 1908.

J. GREIS.

FURNACE. APPLIOA'TIYOYN FILED JAN. 2's, 1907.

3 SHEETS-SHEET 3.

rs: NGRR| nr-nuzs co.. WASHINGTON n. c.

JACOB GREIS, OF WIESBADEN, GERMANY.

FURNACE Specification of Letters Patent.

Patented June 2, 1908.

Application filed January 28, 1907.. Serial No. 353,651.

To all whom it may concern:

Be it known that I, JAooB Gnnrs, of Wiesbaden, a subject of the Kin ofPrussia, and whose post-office address is 0. 2O Walramstrasse,Wiesbaden, Prussia, German Empire, have invented new and usefulImprovements in Furnaces, of which the following is a specification.

The present invention relates particularly to such devices for theintroduction of air and steam through the fire-door of a furnace inwhich a fan or blower is driven by a steam turbine for the introductionof air.

The invention is based upon known devices arranged at the furnace-door,by which devices air is introduced through the furnace-door into thefire-chamber by a blower driven by a steam turbine, and substantiallyconsists in the arrangement of means which make it possible to maintainthe eriod durin which the turbine is driven of the correct duration forthe process of combustion in the furnace. For this purpose duplicateworm-gearing is connected with the shaft of the fan or blower, whichshaft also carries the turbine, said wormgearing driving a cylinder ordrum provided with a screw-thread on which a lever which actuates thesteam-admission valve is displaced. According in each case as this leveris set on one or another thread of the screw of the drum, the steamadmission is cut off earlier or later. The steam-admission conduit isplaced in the box or casing of the fan in order to preliminarily heatthe air.

In the accompanying drawings Fi ure 1 represents a front elevation ofthe device. Figs. 2 and 3 re resent side-elevations from the left handsi e and the right hand side of Fig. 1 respectively. Figs. 4, 5 and 6represent an end elevation, a side elevation and a plan view of the wormgearing and the admission valve on an enlarged scale.

The device consists of a blower or fan a and a fan-casing l), the latterbeing fastened on the fire-door j and provided with an inner steamchannel 0; it consists further of a steam turbine d, mounted on the sameshaft e as the fan a, of a steam valve f for a steam nozzle 9 whichenters into the fire-chamber h and of a steam-admission valve 2' (Fi 5)which is controlled by means of a lever from a wormgear and a drum Zprovided with a screwthread 1n. When the fire-door j is shut thementioned lever 7c is raised by a handle n on to a thread m of the drumZ whereby the controlling valve i islopened. By this means steam canflow from a pipe 0, which is in connection with the steam boiler throughthe valve 11 and a pipe 2 into the annular conduit or channel a which isarranged in the eri hcry of the casing b of the fan a, and owing throughsaid conduit preliminarily heats the air in the casing of the fan. steamgoes from this conduit by means of a ipe p to the admission-nozzle y ofthe turine d which drives the fan (1, whereas the other part of thesteam asses from the said conduit through the va ve f into the steamnozzle 9 which leads into the fire-chamber h. The preliminarily heatedair is blown by the fan a, driven as described, through an airnozzle 1"which is arranged under the steam nozzle 9 on to the fire, and the steamfrom the steam nozzle mixes with the air from the air-nozzle above thefire.

The exhaust steam from the steam turbine assing through a pipe (1 may beconducted from below against the grate and may be utilized for coolingthe grate. The condensed water which is formed by the-steam in thecasing of the fan may be led away through a conduit (15 by means of asuitable steam-trap, so that the steam conducted on to the fire remainsdry.

A duplicate worm-gear is employed for regulating the time of working bymeans of the mentioned lever k and the drum Z provided with a screwthread m in the following manner: A worm s which is situated on themain-shaft e of turbine or fan is rotated by the rotation of theturbine, said worm being in engagement with a wheel t mounted on ashaft, the latter again carrying a worm a which is in engagement with awheel 12 which is connected with a barrel or drum Z, the latter having ascrew-thread m on its periphery. In this manner the drum provided with ascrew-thread is set in rotation very slowly, with duplicatetransmission, by the shaft of the turbine, as soon as the turbine runs.

When the fire-door is shut, the above mentioned lever is is set by meansof a handle n on a part of the thread m on the circumference of thedrum, and thereby the controlling valve i, on the spindle of which valvethe lever 7r presses, if it is not raised up, opens under the action ofa spring w, so that steam is admitted tothe turbine and the latterdrives the fan. When the turbine runs, the duplicate worm-gear s, t, u,'v is also ro- One part of the tated and with it the drum Z providedwith 1 nace, a communication leading from the fan the screw-thread m, sothat the lever 7r slides in the thread of the drum, until it falls offat one end of the drum, and thereby closes the valve i again and stopsthe turbine, as well as the fan. The duration of the time, during whichthe fan works may be set to from one or two up to ten minutes accordingas the lever 1c is set on the last turn, or on the last but one turn ofthe thread on the drum, and so on.

When the fire-door is opened the controlling valve i shuts off the steamfrom the easing of the fan whilst a part of the steam may be conductedabove the furnace-door as required by means of a valve of a steam nozzleon to the fire, whereby the development of smoke whilst stoking the fireis prevented in known manner.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. In a device of the character described, the combination with afurnace and its door; of a fan and its driving turbine mounted on saiddoor, an annular heating conduit in the periphery of said fan, an airnozzle adapted to discharge into said furnace, a communication from saidfan to said air nozzle, means for supplying steam to said annularconduit and thus heating the air in the fan, and

:means for leading steam from said annular conduit to said turbine.

2. In a device of the character described, the combination with afurnace and furnace door; of a fan and its driving turbine mounted onsaid door, an annular heating conduit in the periphery of said fan, airand steam nozzles adapted to discharge into said furnace, acommunication leading from the fan to the air nozzle, a communicationleading from the annular heating conduit in the fan to the steam nozzle,a communication leading from said annular heating conduit to saidturbine and means for supplying steam to said annular heating conduit.

3. In a device of the character described, the combination with afurnace and furnace door; of a fan and its driving turbine mounted onsaid door, an annular heating conduit in the periphery of said fan, anair nozzle adapted to discharge into said furnace, a communication fromsaid fan to said air nozzle, means for supplying steam to said annularheating conduit and thus heating the air in the fan, means for leadingsteam from said annular conduit to said turbine and automatic means fordiscontinuing the supply of steam to said annular heating conduit aftera certain interval of time.

4. In a device of the character described, the combination with afurnace and furnace door; of a fan and its driving turbine mounted onsaid door, an annular heating conduit in the periphery of said fan, airand steam nozzles adapted to discharge into said furto the air nozzle, acommunication leading from the annular conduit in the fan to the steamnozzle, a communication leading from said annular conduit to saidturbine, means for supplying steam to said annular conduit and automaticmeans for discontinuing the supply of steam to said annular conduitafter a certain interval of time.

5. In a device of the character described, the combination with afurnace and furnace door; of a fan and its driving turbine mounted onsaid door, an annular heating conduit in the periphery of said fan, anair nozzle adapted to discharge into said furnace, a communication fromsaid fan to said air nozzle, means for supplying steam to said annularheating conduit, means for leading steam from said conduit to saidturbine, a valve adapted to control the supply of steam to said annularconduit, a rotatable screw threaded drum, a valve control lever adaptedto travel in and be operated by the threaded portion of said rotatabledrum and means for imparting rotation to said drum.

6. In a device of the character described, the combination with afurnace and furnace door; of a fan and its driving turbine mounted onsaid door, an annular heating conduit in the periphery of said fan, airand steam nozzles adapted to discharge into the furnace, a communicationleading from the fan to the air nozzle, a communication leading from theannular heating conduit in the fan to the steam nozzle, a communicationleading from said annular heating conduit to said turbine, means forsupplying steam to said annular heating conduit, a valve adapted tocontrol the supply of steam to said annular heating conduit, a rotatablescrew threaded drum, a valve control lever adapted to travel in and beoperated by the threaded portion of said rotatable drum, and means forimparting rotation to said drum.

7. In a device of the character described, the combination with afurnace and furnace door; of a fan and its driving turbine mounted onsaid door, an annular heating conduit in the periphery of said fan, anair nozzle adapted to discharge into said furnace, a communication fromsaid fan to said air nozzle, means for supplying steam to said annularheating conduit, means for leading steam from said conduit to saidturbine, a valve adapted to control the supply of steam to said annularconduit, a rotatable screw threaded drum, a valve control lever adaptedto travel in and be operated by the threaded portion of said rotatabledrum and means for imparting rotation from the shaft of said turbine tosaid drum.

8. In a device of the character described, the combination with afurnace and furnace door; of a fan and its driving turbine mounted onsaid door, an annular heating conduit in the periphery of said fan, airand steam nozzles adapted to discharge into the furnace, a communicationleading from the fan to the air nozzle, a communication leading from theannular heating conduit in the fan to the steam nozzle, a communicationleading from said annular heating conduit to said turbine, means forsupplying steam to said annular heating conduit, avalve adapted tocontrol the supply of steam to said annular heating conduit, a rotatablescrew threaded drum, a Valve control lever adapted to travel in and beoperated by the threaded ortion of said rotatable drum, and means orimparting rotation from the shaft of said turine to said drum.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JACOB GREIS.

Witnesses:

FRITZ FLIEs'r, MORITZ WETZEL.

